package com.mego.tzadd.version;

import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.DialogInterface.OnClickListener;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.mego.tzadd.R;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.DecimalFormat;

/**
 * 应用程序更新工具包
 *
 * @author liux (http://my.oschina.net/liux)
 * @version 1.1
 * @created 2012-6-29
 */
public class UpdateManager {

    private static final int DOWN_NOSDCARD = 0;
    private static final int DOWN_UPDATE = 1;
    private static final int DOWN_OVER = 2;

    private static final int DIALOG_TYPE_LATEST = 0;
    private static final int DIALOG_TYPE_FAIL = 1;

    private static UpdateManager updateManager;

    private Context mContext;
    //通知对话框
    private Dialog noticeDialog;
    //下载对话框
    private Dialog downloadDialog;
    //'已经是最新' 或者 '无法获取最新版本' 的对话框
    private Dialog latestOrFailDialog;
    //进度条
    private ProgressBar mProgress;
    //显示下载数值
    private TextView mProgressText;
    //查询动画
    private ProgressDialog mProDialog;
    //进度值
    private int progress;
    //下载线程
    private Thread downLoadThread;
    //终止标记
    private boolean interceptFlag;
    //提示语
    private String updateMsg = "";
    //返回的安装包url
    private String apkUrl = "";
    //下载包保存路径
    private String savePath = "";
    //apk保存完整路径
    private String apkFilePath = "";
    //临时下载文件路径
    private String tmpFilePath = "";
    //下载文件大小
    private String apkFileSize;
    //已下载文件大小
    private String tmpFileSize;

    private String curVersionName = "";
    private int curVersionCode;
    private UpdataInfo mUpdate;

    private Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case DOWN_UPDATE:
                    mProgress.setProgress(progress);
                    mProgressText.setText(tmpFileSize + "/" + apkFileSize);
                    break;
                case DOWN_OVER:
                    downloadDialog.dismiss();
                    installApk();
                    break;
                case DOWN_NOSDCARD:
                    downloadDialog.dismiss();
                    Toast.makeText(mContext, "无法下载安装文件，请检查SD卡是否挂载", Toast.LENGTH_SHORT).show();
                    break;
            }
        }

        ;
    };

    public static UpdateManager getUpdateManager() {
        if (updateManager == null) {
            updateManager = new UpdateManager();
        }
        updateManager.interceptFlag = false;
        return updateManager;
    }

    /**
     * 检查App更新
     *
     * @param context
     * @param isShowMsg 是否显示提示消息
     */
    public void checkAppUpdate(Context context, InstallCallBack installCallBack, final boolean isShowMsg) {
        this.mContext = context;
        this.mInstallCallBack = installCallBack;
        getCurrentVersion();
        if (isShowMsg) {
            if (mProDialog == null)
                mProDialog = ProgressDialog.show(mContext, null, "正在检测，请稍后...", true, true);
            else if (mProDialog.isShowing() || (latestOrFailDialog != null && latestOrFailDialog.isShowing()))
                return;
        }
        final Handler handler = new Handler() {
            public void handleMessage(Message msg) {
                //进度条对话框不显示 - 检测结果也不显示
                if (mProDialog != null && !mProDialog.isShowing()) {
                    return;
                }
                //关闭并释放释放进度条对话框
                if (isShowMsg && mProDialog != null) {
                    mProDialog.dismiss();
                    mProDialog = null;
                }
                //显示检测结果
                if (msg.what == 1) {
                    if (mUpdate != null) {
                        if (isNewVersion(mUpdate.getVersion())) {
                            apkUrl = mUpdate.getUrl();
                            updateMsg = mUpdate.getDescription();
//                            showNoticeDialog();
                            showDownloadDialog();//直接更新，不要提示
                        } else if (isShowMsg) {
                            showLatestOrFailDialog(DIALOG_TYPE_LATEST);
                        }
                    }
                } else if (isShowMsg) {
                    showLatestOrFailDialog(DIALOG_TYPE_FAIL);
                }
            }
        };
        new Thread() {
            public void run() {
                Message msg = new Message();
                try {
                    String path = mContext.getResources().getString(R.string.serverurl_version);
                    URL url = new URL(path);
                    HttpURLConnection conn = (HttpURLConnection) url
                            .openConnection();
                    conn.setConnectTimeout(5000);
                    InputStream is = conn.getInputStream();
                    mUpdate = UpdataInfoParser.getUpdataInfo(is);
                    msg.what = 1;
                    //Update update = ApiClient.checkVersion((AppContext)mContext.getApplicationContext());
                } catch (Exception e) {
                    e.printStackTrace();
                }
                handler.sendMessage(msg);
            }
        }.start();
    }

    private boolean isNewVersion(String version) {
        if (version == null || version.length() == 0) {
            return false;
        }
        String newV[] = version.split("\\.");
        String curV[] = curVersionName.split("\\.");
        int minLen = newV.length < curV.length ? newV.length : curV.length;
        for (int i = 0; i < minLen; ++i) {
            String test = newV[i];
            String local = curV[i];
            if (Integer.parseInt(test) > Integer.parseInt(local)) {
                return true;
            } else if (Integer.parseInt(test) < Integer.parseInt(local)) {
                return false;
            }
        }
        if (newV.length > curV.length) {
            return true;
        }
        return false;
    }

    /**
     * 显示'已经是最新'或者'无法获取版本信息'对话框
     */
    private void showLatestOrFailDialog(int dialogType) {
        if (latestOrFailDialog != null) {
            //关闭并释放之前的对话框
            latestOrFailDialog.dismiss();
            latestOrFailDialog = null;
        }
        Builder builder = new Builder(mContext);
        builder.setTitle("系统提示");
        if (dialogType == DIALOG_TYPE_LATEST) {
            builder.setMessage("您当前已经是最新版本");
        } else if (dialogType == DIALOG_TYPE_FAIL) {
            builder.setMessage("无法获取版本更新信息");
        }
        builder.setPositiveButton("确定", null);
        latestOrFailDialog = builder.create();
        latestOrFailDialog.show();
    }

    /**
     * 获取当前客户端版本信息
     */
    private void getCurrentVersion() {
        try {
            PackageInfo info = mContext.getPackageManager().getPackageInfo(mContext.getPackageName(), 0);
//            curVersionName = info.versionName;
            curVersionName = info.versionCode + "";//版本号都用versionCode
            curVersionCode = info.versionCode;
        } catch (NameNotFoundException e) {
            e.printStackTrace(System.err);
        }
    }

    /**
     * 显示版本更新通知对话框
     */
    private void showNoticeDialog() {
        Builder builder = new Builder(mContext);
        builder.setTitle("软件版本更新");
        builder.setMessage(updateMsg);
        builder.setPositiveButton("立即更新", new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                showDownloadDialog();
            }
        });
        builder.setNegativeButton("以后再说", new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        noticeDialog = builder.create();
        noticeDialog.show();
    }

    /**
     * 显示下载对话框
     */
    private void showDownloadDialog() {
        Builder builder = new Builder(mContext);
        builder.setTitle("正在下载新版本");

        final LayoutInflater inflater = LayoutInflater.from(mContext);
        View v = inflater.inflate(R.layout.update_progress, null);
        mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
        mProgressText = (TextView) v.findViewById(R.id.update_progress_text);

        builder.setView(v);
        builder.setNegativeButton("取消", new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                interceptFlag = true;
            }
        });
        builder.setOnCancelListener(new OnCancelListener() {
            @Override
            public void onCancel(DialogInterface dialog) {
                dialog.dismiss();
                interceptFlag = true;
            }
        });
        downloadDialog = builder.create();
        downloadDialog.setCanceledOnTouchOutside(false);
        downloadDialog.show();

        downloadApk();
    }

    private Runnable mdownApkRunnable = new Runnable() {
        @Override
        public void run() {
            try {
                String apkName = "Megoandroid_" + mUpdate.getVersion() + ".apk";
                String tmpApk = "Megoandroid_" + mUpdate.getVersion() + ".tmp";
                //判断是否挂载了SD卡
                String storageState = Environment.getExternalStorageState();
                if (storageState.equals(Environment.MEDIA_MOUNTED)) {
                    savePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Mego/";
                    File file = new File(savePath);
                    if (!file.exists()) {
                        file.mkdirs();
                    }
                    apkFilePath = savePath + apkName;
                    tmpFilePath = savePath + tmpApk;
                }

                //没有挂载SD卡，无法下载文件
                if (apkFilePath == null || apkFilePath == "") {
                    mHandler.sendEmptyMessage(DOWN_NOSDCARD);
                    return;
                }

                File ApkFile = new File(apkFilePath);

                //是否已下载更新文件
                if (ApkFile.exists()) {
                    downloadDialog.dismiss();
                    installApk();
                    return;
                }

                //输出临时下载文件
                File tmpFile = new File(tmpFilePath);
                FileOutputStream fos = new FileOutputStream(tmpFile);

                URL url = new URL(apkUrl);
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.connect();
                int length = conn.getContentLength();
                InputStream is = conn.getInputStream();

                //显示文件大小格式：2个小数点显示
                DecimalFormat df = new DecimalFormat("0.00");
                //进度条下面显示的总文件大小
                apkFileSize = df.format((float) length / 1024 / 1024) + "MB";

                int count = 0;
                byte buf[] = new byte[1024];

                do {
                    int numread = is.read(buf);
                    count += numread;
                    //进度条下面显示的当前下载文件大小
                    tmpFileSize = df.format((float) count / 1024 / 1024) + "MB";
                    //当前进度值
                    progress = (int) (((float) count / length) * 100);
                    //更新进度
                    mHandler.sendEmptyMessage(DOWN_UPDATE);
                    if (numread <= 0) {
                        //下载完成 - 将临时下载文件转成APK文件
                        if (tmpFile.renameTo(ApkFile)) {
                            //通知安装
                            mHandler.sendEmptyMessage(DOWN_OVER);
                        }
                        break;
                    }
                    fos.write(buf, 0, numread);
                } while (!interceptFlag);//点击取消就停止下载

                fos.close();
                is.close();
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    };

    /**
     * 下载apk
     */
    private void downloadApk() {
        downLoadThread = new Thread(mdownApkRunnable);
        downLoadThread.start();
    }

    public interface InstallCallBack {
        void doInstall(String filePath);
    }

    public InstallCallBack mInstallCallBack = null;

    /**
     * 安装apk
     */
    //https://www.jianshu.com/p/a6cad97ea54f     --看不懂
    private void installApk() {

        if (mInstallCallBack != null) {
            mInstallCallBack.doInstall(apkFilePath);
        }
//        File apkfile = new File(apkFilePath);
//        if (!apkfile.exists()) {
//            return;
//        }
//        Intent i = new Intent(Intent.ACTION_VIEW);
//        i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
//        i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
//        mContext.startActivity(i);

    }


    //静默安装
//    https://blog.csdn.net/u013341672/article/details/69320412
//    https://blog.csdn.net/weixin_38775077/article/details/80719393
//要想静默安装app，必须是系统应用或者具有Root权限，否则根本不可能实现静默安装
    /**
     * install slient
     *
     * @param filePath
     * @return 0 means normal, 1 means file not exist, 2 means other exception error
     */
    public static int installSilent(String filePath) {
        File file = new File(filePath);
        if (filePath == null || filePath.length() == 0 || file == null || file.length() <= 0 || !file.exists() || !file.isFile()) {
            return 1;
        }

        String[] args = { "pm", "install", "-r", filePath };
        ProcessBuilder processBuilder = new ProcessBuilder(args);
        Process process = null;
        BufferedReader successResult = null;
        BufferedReader errorResult = null;
        StringBuilder successMsg = new StringBuilder();
        StringBuilder errorMsg = new StringBuilder();
        int result;
        try {
            process = processBuilder.start();
            successResult = new BufferedReader(new InputStreamReader(process.getInputStream()));
            errorResult = new BufferedReader(new InputStreamReader(process.getErrorStream()));
            String s;
            while ((s = successResult.readLine()) != null) {
                successMsg.append(s);
            }
            while ((s = errorResult.readLine()) != null) {
                errorMsg.append(s);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (successResult != null) {
                    successResult.close();
                }
                if (errorResult != null) {
                    errorResult.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (process != null) {
                process.destroy();
            }
        }

        // TODO should add memory is not enough here
        if (successMsg.toString().contains("Success") || successMsg.toString().contains("success")) {
            result = 0;
        } else {
            result = 2;
        }
//        Log.d("test-test", "successMsg:" + successMsg + ", ErrorMsg:" + errorMsg);
        return result;
    }

//    <!-- 静默安装 -->
//<uses-permission android:name="android.permission.INSTALL_PACKAGES" />

}
